CN105921392B - It is conjugated the reciprocal pendular oscillation platform of the compound magnetic energy of constant diameter cam type and driving part and method - Google Patents
It is conjugated the reciprocal pendular oscillation platform of the compound magnetic energy of constant diameter cam type and driving part and method Download PDFInfo
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- CN105921392B CN105921392B CN201610423162.5A CN201610423162A CN105921392B CN 105921392 B CN105921392 B CN 105921392B CN 201610423162 A CN201610423162 A CN 201610423162A CN 105921392 B CN105921392 B CN 105921392B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
- B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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- Engineering & Computer Science (AREA)
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Abstract
The present invention provides a kind of reciprocal pendular oscillation platform of the compound magnetic energy of conjugation constant diameter cam type and driving part and methods, it utilizes and realizes that the geometry of drive part is sealed in the way of the conjugate cam of driven member by roller, prevent the generation of driven member bounce when more than 1g acceleration；Simultaneously using the cam movement of variable motion as the supposed premise condition of kinematics analysis, a kind of reciprocal pendular oscillation equipment of compound magnetic energy has been invented.The wideband vibration output of the ultralow frequency and up to a few kHz of nearly zero-frequency may be implemented in the equipment, and not needing to be powered always generates high-strength magnetic field, has fever smaller, efficiency is higher, and use scope is wide, the larger feature of thrust.
Description
Technical field
The present invention relates to electromagnetic vibration generator systems, and in particular, to the reciprocal pendular oscillation platform of the conjugation compound magnetic energy of constant diameter cam type and
Driving part and method.
Background technique
In recent years, due to vibration-testing under the work condition environment of space flight, aviation, navigational field aircraft or precision equipment
It needs, the demand of high-performance vibration test equipment is more more and more urgent.At present vibratory equipment mainly have hydraulic, pneumatic, electromagnetism and
Mechanical vibration equipment several types.Wherein hydraulic, pneumatic and mechanical vibratory equipment is since achievable driving frequency is low, driving
Controlling unit cannot mostly be suitble to the requirement of the fields such as space flight vibration-testing performance.Electromagnetic drive is due to using electromagnetic signal control
System, the realization of driving realize by electromagnetic energy effect, easy to control, response is sensitive, is particularly suitable for realizing the reality of high-frequency vibration equipment
It is existing, therefore current high-performance vibratory equipment majority is realized using the driving link of electromagnetic drive.Such as Ling company of Britain
Electromagnetic vibration generator system, device drives working principle are based on voice coil motor driving principle, and usual driving coil passes through as stator
Alternating electromagnetism power drive one is suspended in the mover in driving coil center, generates vibration.However, this kind of electromagnetic drive shake table
There are apparent defects, and mainly since mover is in suspension working condition always, 5Hz vibratory drive below is difficult to realize,
Since this driving that suspends is so that the dynamic rigidity during driving is insufficient during driving, in addition the displacement of its high-frequency drive is smaller,
Driving amplitude is inaccurate, and driving energy consumption is larger.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of compound magnetic energy of conjugation constant diameter cam type is reciprocal
Pendular oscillation platform and driving part and method.
A kind of driving part of the reciprocal pendular oscillation platform provided according to the present invention, including electromagnetic coil, roller fixed frame,
Pairs of roller, constant diameter cam, first rotating shaft, permanent magnet；
Pairs of roller is fastenedly connected on roller fixed frame；
Constant diameter cam, permanent magnet are mounted in first rotating shaft；
Pairs of roller includes upper roller, the lower roller contacted with constant diameter cam, wherein belongs to the upper of same pairs of roller
Axial connecting line between roller, lower roller passes through the cam centre of gyration of constant diameter cam, and upper roller, the radius of lower roller are equal.
It preferably, further include guiding parts；
Under the excitation of electromagnetic coil, permanent magnet drives constant diameter cam reciprocally swinging by first rotating shaft, and constant diameter cam is logical
Pairs of roller driving roller fixed frame is crossed along guiding parts along straight reciprocating motion.
Preferably, during constant diameter cam reciprocally swinging, constant diameter cam connects with same upper roller or same lower roller
The cam profile shape of touching is a continuous function curved section.
Preferably, the inside of electromagnetic coil is arranged in roller fixed frame.
It preferably, further include following any or various structures：
Magnetic loop structure：The outside of electromagnetic coil is provided with magnetic loop structure, and magnetic loop structure is made of permeability magnetic material；
Elastic support structure：Roller fixed frame is supported on elastic support structure.
Preferably, the quantity of pairs of roller is a pair of or multipair, wherein multipair pairs of roller is located in the same plane
Or be located in multiple planes, the radius between the upper roller of multipair pairs of roller, lower roller is equal；
The quantity of electromagnetic coil is one group or multiple groups.
A kind of reciprocal pendular oscillation platform of the compound magnetic energy of conjugation constant diameter cam type provided according to the present invention, including electric and magnetic oscillation
Platform, the driving part of the electromagnetic vibration generator system use the driving part of above-mentioned reciprocal pendular oscillation platform.
Preferably, including support frame, convergence piece, bearing spider, the second shaft；
Electromagnetic vibration generator system, convergence piece are sequentially connected between support frame；
Convergence piece is detachably connected support frame；
Bearing spider is detachably connected support frame；
The threaded one end of second shaft connects convergence piece, and the other end of the second shaft assembles bearing spider.
Preferably, it is provided in convergence piece and is installed on different groups of peaces with the matched multiple groups mounting hole of support frame, support frame
Dress can form different angles in hole from electromagnetic vibration generator system.
The control method of the driving part of the above-mentioned reciprocal pendular oscillation platform of the one kind provided according to the present invention, including：Enable electricity
Magnetic coil is powered to generate the magnetic field of stable or alternation, wherein the field drives permanent magnet is driven isometrical by first rotating shaft
Cam reciprocating is swung, and constant diameter cam drives roller fixed frame along guiding parts along straight reciprocating motion by pairs of roller；
The revolving speed of first rotating shaft is variation.
Compared with prior art, the present invention has following beneficial effect：
The present invention is based on permanent magnets, and torque suspension rotates in the electromagnetic field that hot-wire coil generates and then offer drives power
Mechanism utilizes and realizes that the geometry of drive part is sealed in the way of the conjugate cam of driven member by roller, prevents driven member super
The generation of bounce when crossing 1g acceleration；Simultaneously using the cam movement of variable motion as the supposed premise item of kinematics analysis
Part has invented a kind of reciprocal pendular oscillation equipment of compound magnetic energy.The ultralow frequency of nearly zero-frequency and up to several may be implemented in the equipment
The wideband of kHz vibrates output, and not needing to be powered always generates high-strength magnetic field, has fever smaller, efficiency is higher, uses model
Enclose wide, the larger feature of thrust.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1, the overall structure diagram Fig. 2 shows electromagnetic vibration generator system.
Fig. 3 is the schematic diagram that driving part moves between position A and position B.
Fig. 4 is the structural schematic diagram of multipair pairs of roller.
Fig. 5 is the schematic illustration of electromagnetic vibration generator system.
Fig. 6 is the electromagnetic coil arrangement of one-dimensional single-layer type.
Fig. 7, Fig. 8 are the electromagnetic coil arrangement of one-dimensional single-layer type.
Fig. 9, Figure 10 are the electromagnetic coil arrangement of one-dimensional multiple field.
Figure 11 is the mounting means of sensor.
Figure 12 is the installation front view of electromagnetic vibration generator system.
Figure 13 is the installation side view of electromagnetic vibration generator system.
Figure 14 is the partial enlarged view of the mounting structure of electromagnetic vibration generator system.
Figure 15 is that convergence piece compares the contrast schematic diagram compared between partial region and whole region.
Figure 16 is the schematic diagram of 45 degree of setting angles of electromagnetic vibration generator system.
Figure 17 is the schematic diagram of 90 degree of setting angles of electromagnetic vibration generator system.
In figure：
Roller 301- the first roller the second roller of 302- 4- is isometrical convex on 1- electromagnetic coil 2- roller fixed frame 3-
Take turns the 4th roller 6- first rotating shaft 7- permanent magnet 8- magnetic line of force 9- magnetic conductive loop of 5- lower roller 501- third roller 502-
Components 10- flux loop 11- external orientation structure 12- elastic support structure 13- air chamber inflating port 14- air
Room
21- guiding parts 22- magnetic conductive loop 23- electromagnetic coil combines 24- driven member 25- driving part 26- support
Frame 27- elastic support member
31- test specimen 32- acceleration transducer 33- fixture 34- force snesor 35- expanding table 36- shake table
41- shake table ontology 42- convergence piece 43- support frame 44- screw 45- screw and spring washer 46- bearing branch
Seat 47- backing-up screw the second shaft of 48-
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection scope.
As shown in figure 3, a kind of driving part of the reciprocal pendular oscillation platform provided according to the present invention, which is characterized in that including
Electromagnetic coil, roller fixed frame, pairs of roller, constant diameter cam, first rotating shaft, permanent magnet, guiding parts；Pairs of roller fastening
It is connected on roller fixed frame；Constant diameter cam, permanent magnet are mounted in first rotating shaft；Pairs of roller includes and constant diameter cam
Upper roller, the lower roller of contact, wherein belong to axial connecting line between the upper roller of same pairs of roller, lower roller by etc.
The cam centre of gyration of diameter cam, upper roller, the radius of lower roller are equal.Under the excitation of electromagnetic coil, permanent magnet passes through the
One shaft drives constant diameter cam reciprocally swinging, and constant diameter cam drives roller fixed frame along guiding parts along straight by pairs of roller
Line moves back and forth.
The quantity of electromagnetic coil is one or more, and multiple electromagnetic coils are capable of forming coil combination, and electromagnetic coil is logical
Electricity can produce stable or alternation magnetic field, and the magnetic line of force 8 is a kind of side of the magnetic field magnetic induction line generated in the case of its energization in Fig. 3
To.Roller 3 and lower roller 5 can be fixed on roller fixed frame 2, while being realized up and down under the action of external guiding parts
Linear motion.Upper roller 3 and lower roller 5 are contacted with constant diameter cam 4 simultaneously, thereby realize it is sealed to the geometry of cam, can
The phenomenon that driven member bounces when height operates even is eliminated to weaken to a certain extent.Permanent magnet 7 links together with cam 4,
It can be rotated with synchronous rotation axis 6, to drive driven member, i.e. frame 2 by roller 3 and 5, do linear motion up and down.
Permanent magnet 7 is horizontally situated in left subgraph in Fig. 3, and frame 2 is located at position A.The magnetic field shown in left subgraph
Under, permanent magnet 7 is intended to keep its internal magnetic field direction identical as locating magnetic direction, thus can generate clockwise turn
Square.Under this torque, permanent magnet 7 drives clockwise synchronize of cam 4 being connected thereto together to turn over equal angular, to the right side
Position shown in subgraph.At this point, frame 2 is under the action of cam and roller and under the guiding of external orientation component, movement is in place
Set B.It is passed through reversed electric current, then forms reversed magnetic field, permanent magnet 7 can then generate reversed torque, and then frame 2 is transported downwards
It is dynamic.To which electromagnetic coil 1 is passed through the electric current of alternating form, then can generate the magnetic field of alternating form, and permanent magnet 7 can also be made herein
With the lower torque for generating alternating form, the driven member that driving roller is formed with frame pumps, i.e. sine and cosine form
Movement.
As shown in figure 4, the quantity of roller can be multipair in pairs, wherein multipair pairs of roller is located in the same plane
Or be located in multiple planes, the radius between the upper roller of multipair pairs of roller, lower roller is equal.
Fig. 4 shows the first roller 301 as upper roller, the second roller 302, further it is shown that the third as lower roller
Axis of the axial connecting line of this four rollers of roller 501, the 4th roller 502, the first roller and the 4th roller Jing Guo first rotating shaft 6
The axial connecting line of the heart, the second roller and third roller also passes through the axle center of first rotating shaft 6.The axle center of first roller and the 4th roller
Away from the distance of shaft centers for being equal to the second roller and third roller, and the first roller 301, the second roller 302, third roller the 501, the 4th
The radius of this four rollers of roller 502 is equal.Feature：
(1) multiple rollers while stress, the more difficult failure of roller, power output is bigger, longer life expectancy.
(2) multipair roller increases the redundancy of structure, is conducive to eliminate gap.
(3) multipair roller is arranged in the both sides of center line, and part of horizontal component suffered by frame 2 can be made mutual
It offsets, it is simplified and stable to be more advantageous to structure.
(4) roller is not necessarily located in same plane, can also form multilayer form.
(5) roller be not necessarily it is a pair of, two pairs, can also be three pairs or multipair.
It is with the difference of traditional electromagnetic vibration generator system, feature in drive mechanism of the invention：Traditional electromagnetic vibration generator system is according to electricity
The difference of magnetic field excitation mode is divided into electromagnetic type and magneto electric vibration table.Its principle utilized is all switched on conducting wire in magnetic field
The physics principle of middle stress, i.e. F=BLI.B therein is provided by electromagnetic coil either permanent magnet.Electromagnetic coil excitation
Magnetic field strength is big but power consumption, and the magnetic field strength that permanent magnet generates is small but less energy-consuming.Wherein L and I is powered in moving-coil respectively
Total length and electrical current of the conducting wire in magnetic field.Traditional mode is the electricity formed by the above mechanism perpendicular to magnetic direction
Magnetic drive circle moves up and down, thus waveform needed for output.It is the power in the rectilinear direction directly exported.And the present invention is special
Point is as follows
(1) non-critically, the magnetic field strength provided is between electromagnetism and permanent magnetism mode.
(2) it relative to the mode for using coil magnetization, does not need to be powered constantly, saves electric energy.
(3) relative to using permanent magnet to generate that mode of air-gap field, do not need so much permanent magnet, save at
This.
(4) it makes the rotation of its cam shafting to drive driven member to move the torque of permanent magnet using magnetic field, that is,
Say that electromagnetic field produces the power that torque has been then converted into rectilinear direction.
(5) it generates changing magnetic field intensity by being passed through the electric current of coil variation, changes permanent magnet institute torque suspension, thus
Drive the movement of moving platform or driven member output sine and cosine type.
(6) one or more pairs of rollers from up and down direction simultaneously contact cam, it is sealed to realize geometry, it is therefore prevented that frame or
The generation of bounce of the driven member when being greater than 1g acceleration.
Further, during constant diameter cam reciprocally swinging, constant diameter cam and same upper roller or same lower roller
The cam profile shape of contact is a continuous function curved section.Convex profile type design of the present invention is distinguished as with conventional high rate cam：
The application method of traditional cam mechanism is to make camshaft uniform rotation, then its swing driven or translating follower
Certain periodic motion can be exported according to scheduled rule.There are rigid shocks and soft impulse for the cam of traditional high speed
It is because the curve in one week is differently made of accelerating sections, accelerating sections, at the uniform velocity section, the function of different sections is in interface
Place be easy to produce impact.It is characteristic of the invention that：
(1) present invention is maximum is not both, and the revolving speed in the present invention as the first rotating shaft of camshaft is variation.It is simultaneously
It does not utilize the uniform rotation of cam and driven member is made to export periodic motion, but utilize past physical pendulum of the cam under a certain angle
It is dynamic.Its revolving speed is variation in this process.
(2) cam of the invention does not need complete cycle or the significantly variation of angular range, it is only necessary in one small angle model
Enclose interior reciprocally swinging.
(3) if roller only the function curve section reciprocating motion in cam contour, there is no need to consider difference
The rigidity and soft impulse of the joint of curved section.Thus just there is no traditional High speed cams when high speed uniform rotation
The acceleration of generation, acceleration step phenomenon.It avoids this point in principle.
(4) using corner as abscissa, driven member moving displacement is in working range, that is, to put in the X-Y scheme of ordinate
In dynamic angular range, the equivalent movement of driven member output is constant velocity motion, and velocity equivalent is definite value, and equivalent acceleration is
Zero.This is the convenience of simplification and the control for kinetic model.
(5) cam is constant diameter cam, can make the upper lower roller of cam while contact, and realizes that geometry is sealed.It can be
The case where cam and roller are detached from when high acceleration is avoided to a certain extent, avoids bounce.The characteristics of constant diameter cam be through
Any straight line of the excess convexity wheel centre of gyration between two intersection points of cam pitch curve curve at a distance from remain unchanged.
(6) quantity of roller not necessarily two, are also possible to multiple, but radius of roller is equal and a pair of of roller axle center
Line pass through the cam centre of gyration.Entire load-carrying capacity can be improved in this way, cam is made to export bigger torque, reduce surface
The possibility of damage and failure extends the service life.Its structure is as shown in Figure 4.
As shown in figure 5, the driving part of the reciprocal pendular oscillation platform, further includes：Magnetic loop structure, elastic support structure.
The outside of electromagnetic coil is provided with magnetic loop structure, and magnetic loop structure is made of permeability magnetic material；Roller fixed frame is supported on
On elastic support structure.The inside of electromagnetic coil is arranged in roller fixed frame.Traditional oscillating tables generally mainly by movable part,
Targeting part, suspension support part, magnetic loop part and additional runing rest part composition.Movable part just includes moving-coil
And conducting wire thereon.Targeting part is generally the modes such as roller, linear guide, U-shaped spring.Suspension support system is generally sky
Gas spring, rubber spring, U-shaped spring etc..
Drive part is same as shown in Figure 3, and components representated by driven member 24 refer to be made of frame and expanding table etc.
Structure, magnetic conductive loop components 9 are fixed together with shake table shell, can be made of multiple conducting parts.Assume in Fig. 5
A kind of direction for the magnetic line of force that coil step mode generates, indicating the conducting circuit of the magnetic line of force in the structure.It leads outside
It can be linear guide, linear bearing, roller roller or other components with straight-line guidance effect to structure 11, it is main to rise
The effect moved in a straight line to guidance 2.Elastic support structure 12 can be air spring, mechanical spring, rubber spring, air rubber
Glue spring etc..The present invention is further distinguished as with traditional electromagnetic vibration generator system：
(1) traditional electromagnetic vibration generator system, either twin coil or single coil structure are all the air-gap fields utilized, i.e.,
Very powerful magnetic field is formed in very narrow space, to provide enough driving forces.And difference of the invention is, not
Have using air-gap field, but torque needed for solenoidal central magnetic field generates is utilized.So the central part of electromagnetic coil 1
It should be sky, without high permeability material as iron core, to place driving part.
(2) electromagnetic coil 1 is powered, and is just formed in the interior thereof magnetic field.If electric current is alternation, magnetic field is also alternation.
In addition to this, no other parts need to consume electric current.High-efficient, power is relatively small, generates heat smaller, it is possible to not need wind
Machine etc. is aerated cooling.
(3) material with relatively high magnetic conductivity forms magnetic loop structure 9 outside electromagnetic coil 1, to reduce circuit
Magnetic resistance.Different from traditional electromagnetic vibration generator system, central magnetic pole is not needed.Since magnetic field is alternation or transient changing, hold
Vortex is generated easily on the magnetic loop for possessing high magnetic conductivity, thus magnetic loop can add the reductions such as hollow out or lamellar vortex
Structure.
(4) in order to reduce the distortion of mission nonlinear caused by the asymmetry in structure, structure should be use up in the up-down direction
Amount is symmetrical；To save coil inside space, guide frame should be distributed in the outside of electromagnetic coil 1.
(5) since the support force that elastic support structure 12 provides has balanced the driven member 24 of frame and expansion platform composition
Weight, therefore in the case where not powered, constant diameter cam 4 is attained by equilibrium state under any angle, it can in work
Make static under any angle in range to get off.General, equilbrium position is controlled in 7 horizontal position of permanent magnet, because herein
When power-up, detent torque is maximum.
(6) equilbrium position of cam can be adjusted by elastic support structure 12 when not powered, for example, if elasticity
Support construction 12 is air spring, then by being filled with a certain amount of air, so that it may increase air spring internal pressure, driven
Under the premise of 24 total weight of part is constant, equilbrium position be will be shifted up, and permanent magnet is no longer on horizontal position at this time, but and horizontal position
It is equipped with certain angle.A part of gas is released, then equilbrium position moves down.
(7) the angle middle position of the reciprocally swinging of constant diameter cam 4 is exactly equilbrium position when working normally.In work model
It encloses, i.e., within the scope of pivot angle, is contacted simultaneously with upper roller 3 and lower roller 5 always, moreover, being always positioned at cam profile curve etc.
It imitates at the curved section part that speed is constant, without departing from this range.
(8) if permanent magnet 7 is not at predetermined position, and be inconvenient to adjust elastic support structure 12 at this time, then can lead to
It crosses and certain constant current is applied to electromagnetic coil 1 permanent magnet 7 is made to generate certain torque, to make constant diameter cam 4 and permanent magnetism
The assembly that body 7 forms is rotated synchronously to predetermined position.
(9) since the presence of traditional elastic support structure props up the lower frequency limit of the vibration-testing of shake table by elasticity
Support structure determines, present invention be distinguished in that elastic support structure 12 can be not required to use in low-frequency range effect.At this time
It is equivalent to by cam and its shafting shared weight of driven member 24.Elastic support structure no longer plays a role.Thus
Avoid low-frequency range, especially 5Hz resonant frequency below.
(10) present invention carries out the mode difference of vibration-testing.If test frequency concentrates on low-frequency range (close to zero-frequency)
When, elastic support structure 12 can be removed and tested.And if flexibly supported when test frequency is concentrated mainly on high band
Structure 12 still needs to play a role.
According to the form of the effect of aforementioned coil, the arrangement of coil can be there are many scheme.It can from different dimensions and not
Classify on same level.They respectively have the Operational Mechanisms of oneself, realize the electromagnetic field of required frequency by respective mode
Output.
As shown in fig. 6, being one-dimensional single-layer type, this mode provides required alternating magnetic field by the electromagnetic coil of a monolith,
Structure is simple.But the impedance generated when high frequency is larger.
As shown in Figure 7, Figure 8, be one-dimensional single-layer type coil, this scheme one monolith electromagnetic coil is improved to inside and outside two layers or
Multilayer.The step mode of coil can be selected according to power and frequency.When low frequency, mentioned by most or all of coil
For magnetic field.When high frequency, alternating magnetic field needed for being provided by inner coil, induction reactance is opposite to be reduced very much.It is required that the power of output is larger
When, it can be with the electricity parameters output simultaneously of multiple coils；When output power is smaller, it is possible to reduce while the number for the coil being powered
Amount.Meanwhile the mode of connection of inner-outer coil also can change.It can concatenate or and connect.It is then equivalent to when concatenation one big
Coil, with scheme shown in Fig. 6, and while connecing, then relatively reduces the resistance of circuit.
It as shown in Figure 9, Figure 10, is one-dimensional multiple field.The arrangement of this electromagnetic coil both can also may be used with heat dissipation ventilation
It is a kind of comparatively ideal coil arrangement to further decrease the induction reactance of circuit coil.But it is relatively complicated in structure
It is some, need to consider the fixation of the positional relationship and coil between different coils.
The reciprocal pendular oscillation platform of the compound magnetic energy of conjugation constant diameter cam type provided according to the present invention, including electromagnetic vibration generator system, institute
The driving part for stating electromagnetic vibration generator system uses the driving part of the reciprocal pendular oscillation platform.The compound magnetic of the conjugation constant diameter cam type
The reciprocal pendular oscillation platform of energy, which is characterized in that including support frame, convergence piece, bearing spider, the second shaft；Electromagnetic vibration generator system, linking
It is sequentially connected between part, support frame；Convergence piece is detachably connected support frame；Bearing spider is detachably connected support frame；Second turn
The threaded one end of axis connects convergence piece, and the other end of the second shaft assembles bearing spider.Be provided in convergence piece respectively with support
The matched multiple groups mounting hole of frame, support frame are installed in different groups of mounting holes, and different angles can be formed from electromagnetic vibration generator system.
The present invention realizes that the mode of wideband vibration is different from traditional electromagnetic vibration generator system.Realization mechanism and the following institute of method
It states：
(1) realization of wideband vibration-testing
In low frequency and ultralow frequency, the compressed air of air chamber 14 can be bled off, air spring loses effect.In this way,
It is equivalent to constant diameter cam 4 and cam shaft part bears driven member 24 composed by moving platform and thereon test specimen
Total weight.At this time without the effect of air spring, the kinetics equation of system can also occur to change accordingly, and system does not have yet
There is the first natural frequency generated due to air spring, thus can achieve the test frequency of ultralow frequency.
In upper frequency, since it is far from low-frequency range, can be passed through by air chamber inflating port 13 into air chamber 14
Air forms the effect of air spring, and driven member 24 is jacked up, and is conducive to the driving force provided needed for reducing cam in this way, from
And reduce the size of the electrical current of electromagnetic coil combination 23, thus more power saving.Simultaneously as air spring has balanced
The gravity in portion, thus be pressed in the pressure on cam shaft and reduce very much.
(2) realization of reactive optimization
Presence and model due to various disturbing factors have the characteristics that non-linear, time variation, uncertainty, local oscillator
Dynamic platform is more difficult to establish accurate mathematical model.Here, we select a kind of black box stochastic model, i.e. the autoregression mould with control amount
Type, abbreviation CARMA model.Model parameter is recognized using least square method, and for the method since algorithm is simple, calculation amount is small,
It can realize on-line identification simultaneously, it is very widely used at present.
Shake table increases Displacement Feedback link in low frequency, and when high frequency increases speed and force feedback link, Real-time Feedback quilt
Control amount.Algorithm is using improved generalized predictive adaptive control algorithm, it can be achieved that prediction model, rolling optimization, feedback correction three
The control of a link the advantage is that in combination with past and present input and output, while introduce the desired output in future, and right
The control amount in future carries out multi-step prediction, while rolling optimization process can carry out online repeatedly, and which enhances the suitable of system
With property and anti-interference, the precision of control is substantially increased.
(3) realization of the vibration regularity of desired output
For vibrating bench control system, the output electric current i of coil is input quantity, and the displacement x of driven member is output quantity.It is real
Current prestige vibration motion rule, that is, x specific function, it must be understood that the function i of the output electric current corresponding to it.This is one
The process for reverse of uniting asks input by output.The inverse solution model for thus needing to find out system, so that the function by x (t) is asked
Obtain i (t).By solving CARMA model, it is easy to obtain i (t).It is passed through electric current i (t) into coil, required fortune can be realized
Dynamic x (t).
(4) arrangement of power control and sensor
When test, force snesor and acceleration transducer is added, can successively realize Acceleration Control, power control, power limit control
Make (acceleration and power dual control) three kinds of control modes.The Acceleration Control for depending on interface unduly is likely to result in the mistake of power load
To a certain extent power control and force limited control can be incorporated herein to avoid the generation for crossing experimental phenomena in test, power control.
Test specimen 31 is equipped with acceleration transducer 32 to test the acceleration responsive at its difference above above
Situation.Fixture 33 is to fixed test specimen 31.Force snesor 34 is mounted between fixture 33 and expanding table 35.Force snesor choosing
With piezoelectric type bidirectional stretch pressure sensor, measurement of the sensor to pulling force can be realized by pretension bolt.Such mounting means
Force sensor integrated is set to simplify test process on a vibration table.
Test specimen generally has the characteristics that large scale, big quality, high mass center, multiple degrees of freedom, only with single sensor meeting
The overtesting or undertesting of certain frequency ranges are caused, therefore, shake table test macro uses multisensor Data Fusion technology, realizes
The Multichannel average control of more than two sensors.The principle of the position at control point selected is the consistency for avoiding each point from responding
With the class same sex, the control point the more more approaching to reality situation.Since expanding table is symmetrical structure, multiple force sensors can be evenly arranged on
On the same circumference.
Next the structure of the runing rest of electromagnetic vibration generator system in the present invention is described in detail with mounting means.
Shake table ontology 41 is linked together convergence piece 42 and support frame 43 by screw 44.Pass through spiral shell on support frame 43
Nail is equipped with bearing spider 46.The mode that second shaft, 48 one end is connected through a screw thread links together with convergence piece 42, another
End is assembled together by way of cooperation with bearing spider 46.The axle center of second shaft 48 is not added fixture by shake table and bears
Center of gravity when load.The effect of second shaft 48 is, when adjusting shake table rotation angle, to can be used as shaft, undertake shake table
Gravity.Backing-up screw 47 is threadedly connect with the second shaft 48, for preventing shake table from rotating at work.Power
Direction of transfer is, in the weight transmitting to the second shaft 48 of shake table ontology 41 and convergence piece 42, the second shaft 48 by with axis
The cooperation of support 46 is held by weight transfer to bearing spider 46, then passes through the screw thread between bearing spider 46 and support frame 42
Connection type transfers force on support frame 42.
Support frame 43 can cast acquisition, can also be with welding fabrication.Support frame need not be played support and be made by structure type in figure
With.By several screws 44 being distributed on the line of symmetry parallel with shake table axis, convergence piece 42 and shake table ontology
41 link together.Convergence piece 42 needs not be disc, as long as can open threaded hole above it and fix with shake table.Spiral shell
Nail and spring washer 45 are spaced special angle and are distributed in convergence piece 42, and convergence piece 42 and support frame 43 are connected.Shake table rotation
When turning, it can remove.It is fixed, shake table can be maintained on certain angle by the screw and support frame of different location.
The locking of the certain operating angle of shake table can be realized by two ways.The first is by convergence piece 42 points
The threaded hole of cloth.Second is by backing-up screw 47.
As shown in electromagnetic vibration generator system installation side view, just there is threaded hole every certain angle on the circumference of convergence piece 42, with
Mounting screw and spring washer 45, make it link together with support frame 42, rigidity when improving shake table work between component.It adjusts
The different threaded hole of whole shake table is corresponding with the hole on support frame 42, so that it may adjust the inclined angle of shake table.Such as in side view
In the case of shown in figure, the angle of shake table can be positioned in 0 to 360 degree ranges every 45 degree.Shake table is by holding in the mouth
When working under the special angle that fitting screw thread pore size distribution is determined, structure global stiffness is big when connecting than no screw.Vibration
When platform works under special angle, the locking that backing-up screw 47 carries out operating angle can be tightened simultaneously.
When backing-up screw 47 locks shake table angle, if desired shake table is fixed on different from above-mentioned locking mode
Certain tilt angle can then tighten screw 47, and then backing-up screw 47 is made to prevent from shaking by the friction between support frame 42
Dynamic platform rotation.When needing whirling vibration platform to be adjusted to suitable operating angle, first releasing screw 47, then make shake table around
Second shaft 48 turns to specified angle, finally tightens backing-up screw 47 again.
Fixed form between bearing spider 46 and support frame 42 is not unique, and bearing spider 46 can be fixed on side wall,
It can also fix on the lower surface.
The present invention is different from the characteristics of Traditional oscillating tables shaft locking mode and is convergence piece.What is be distributed thereon is used for and branch
The threaded hole of support connection can be designed processing according to actual needs, flexibly and easily.And convergence piece, shaft and bearing spider
Combination can unload shake table gravity well, the mode rotated around the shaft facilitates adjustment posture；It simultaneously can also be with support
Frame connection, to increase the rigidity under operating angle, enhancing locking effect is good.
The control method of the driving part of one kind reciprocal pendular oscillation platform provided according to the present invention, including step：It enables
Electromagnetic coil is powered to generate the magnetic field of stable or alternation, wherein the field drives permanent magnet passes through first rotating shaft drive etc.
Diameter Cam reciprocating is swung, and constant diameter cam drives roller fixed frame along guiding parts along straight reciprocating motion by pairs of roller.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (10)
1. a kind of driving part of reciprocal pendular oscillation platform, which is characterized in that including electromagnetic coil, roller fixed frame, in pairs rolling
Son, constant diameter cam, first rotating shaft, permanent magnet；
Pairs of roller is fastenedly connected on roller fixed frame；
Constant diameter cam, permanent magnet are mounted in first rotating shaft；
Pairs of roller includes upper roller, the lower roller contacted with constant diameter cam, wherein belongs to the upper rolling of same pairs of roller
Axial connecting line between son, lower roller passes through the cam centre of gyration of constant diameter cam, and upper roller, the radius of lower roller are equal.
2. the driving part of reciprocal pendular oscillation platform according to claim 1, which is characterized in that further include guiding parts；
Under the excitation of electromagnetic coil, permanent magnet drives constant diameter cam reciprocally swinging by first rotating shaft, and constant diameter cam passes through into
To roller driving roller fixed frame along guiding parts along straight reciprocating motion.
3. the driving part of reciprocal pendular oscillation platform according to claim 1, which is characterized in that in constant diameter cam reciprocally swinging
During, the cam profile shape that constant diameter cam is contacted with same upper roller or same lower roller is a continuous function curved section.
4. the driving part of reciprocal pendular oscillation platform according to claim 1, which is characterized in that the setting of roller fixed frame exists
The inside of electromagnetic coil.
5. the driving part of reciprocal pendular oscillation platform according to claim 1, which is characterized in that further include it is following any or
Appoint various structures：
Magnetic loop structure：The outside of electromagnetic coil is provided with magnetic loop structure, and magnetic loop structure is made of permeability magnetic material；
Elastic support structure：Roller fixed frame is supported on elastic support structure.
6. the driving part of reciprocal pendular oscillation platform according to claim 1, which is characterized in that the quantity of pairs of roller is one
To or it is multipair, wherein multipair pairs of roller be located in the same plane or be located at multiple planes in, multipair pairs of roller
Radius between upper roller, lower roller is equal；
The quantity of electromagnetic coil is one group or multiple groups.
7. a kind of reciprocal pendular oscillation platform of the compound magnetic energy of conjugation constant diameter cam type, including electromagnetic vibration generator system, which is characterized in that the electricity
The driving part of magnetic vibration platform uses the driving part of reciprocal pendular oscillation platform described in any one of claims 1 to 6.
8. the reciprocal pendular oscillation platform of the compound magnetic energy of conjugation constant diameter cam type according to claim 7, which is characterized in that including branch
Support, convergence piece, bearing spider, the second shaft；
Electromagnetic vibration generator system, convergence piece are sequentially connected between support frame；
Convergence piece is detachably connected support frame；
Bearing spider is detachably connected support frame；
The threaded one end of second shaft connects convergence piece, and the other end of the second shaft assembles bearing spider.
9. the reciprocal pendular oscillation platform of the compound magnetic energy of conjugation constant diameter cam type according to claim 8, which is characterized in that convergence piece
On be provided with the matched multiple groups mounting hole of support frame, support frame is installed in different groups of mounting holes can be with electromagnetic vibration generator system
Form different angles.
10. a kind of control method of the driving part of reciprocal pendular oscillation platform described in any one of claims 1 to 6, feature
It is, enables electromagnetic coil be powered to generate the magnetic field of stable or alternation, wherein the field drives permanent magnet passes through first rotating shaft
Constant diameter cam reciprocally swinging is driven, constant diameter cam drives roller fixed frame along guiding parts along linear reciprocation by pairs of roller
Movement；
The revolving speed of first rotating shaft is variation.
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| CN107228621A (en) * | 2017-06-08 | 2017-10-03 | 重庆腾毅兴精密电子有限公司 | A kind of voice coil motor swing detecting device and its method |
| CN110332277B (en) * | 2019-07-02 | 2020-06-12 | 上海交通大学 | Curved surface thin-wall part vibration control device based on permanent magnet drive |
| CN111570105B (en) * | 2020-05-13 | 2021-03-16 | 西安交通大学 | Variable-mass power centrifuge and experimental method |
| CN111595846B (en) * | 2020-05-29 | 2023-05-05 | 北京大恒图像视觉有限公司 | Electrical control system of low-noise wine foreign matter inspection machine |
| CN114739675B (en) * | 2022-05-11 | 2023-05-09 | 北京航空航天大学 | Variable-frequency electromagnetic drive roller-raceway failure principle test device |
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| GB1410180A (en) * | 1972-03-02 | 1975-10-29 | Int Mechanical Vibration Lab I | Electromagnetic vibrators |
| CN1745907A (en) * | 2004-06-23 | 2006-03-15 | 三星电机株式会社 | Vertical vibrator |
| CN202052684U (en) * | 2011-01-28 | 2011-11-30 | 上海交通大学 | Force-control type electromagnet and permanent magnet compound excitation vibration table |
| CN205762153U (en) * | 2016-06-14 | 2016-12-07 | 上海交通大学 | Conjugation constant diameter cam type is combined magnetic energy reciprocal pendular oscillation platform and driver part |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1410180A (en) * | 1972-03-02 | 1975-10-29 | Int Mechanical Vibration Lab I | Electromagnetic vibrators |
| CN1745907A (en) * | 2004-06-23 | 2006-03-15 | 三星电机株式会社 | Vertical vibrator |
| CN202052684U (en) * | 2011-01-28 | 2011-11-30 | 上海交通大学 | Force-control type electromagnet and permanent magnet compound excitation vibration table |
| CN205762153U (en) * | 2016-06-14 | 2016-12-07 | 上海交通大学 | Conjugation constant diameter cam type is combined magnetic energy reciprocal pendular oscillation platform and driver part |
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